We should check geometry size, perpendicularity,degree level and deflection etc. after the structures are installed completely:● Checking connecting parts connect firmly or not. ● Checking the electric connection is correct and limit switch is reliable or not. ● Checking parts of hydraulic system leak oil or not and the lifting is good or not. ● Checking mechanism and structure parts run successfully or not. 9.5、checking lubricating condition of rotating parts. ● Checking the oil level meet the requirements or not ,and then making a trial run .● After all of above checking and adjustments are finished, and making sure every part goes well, and then doing the trial run.